BATTLE ON MERCURY by Erik van Lhin [pseudonym]. Philadelphia, Toronto: The John C. Winston Company, . Octavo, cloth. First edition. On the planet Mercury an imperiled young miner and the pacifistic native wispies are forced to confront the demons, the wispies' insane biologically engineered silicone children. Part of the classic Winston science fiction series for young readers published between 1952 and 1961. A fine copy in near fine first printing dust jacket (15 titles listed on rear panel) with some rubbing at edges and slight loss at upper corners. (#126961).